使用jquery处理ajax返回XML
JS代码:
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<%@ page language= "java" import= "java.util.*" pageEncoding= "gbk" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" > <html> <head> <script type= "text/javascript" src= "jquery-1.4.2.js" ></script> <script type= "text/javascript" > function jj(){ $.ajax({ url: 'AjaxServlet' , //提交的地址 type: 'post' , //提交方式 dataType: 'XML' , //数据的类型,XML、text,注意XML是大写的 error: function (){ //出现异常时调用回调函数 alert( '无法返回正确的数据' ); }, //当成功返回数据时进行的操作, //如果前面dataType设置了XML,那么参数xml是XML文档的内容 //如果前面dataType设置了text,那么参数xml是字符串 success: function (xml){ //解析XML跟解析HTML差不多,获取文本值时最好用text(),因为有些jquery版本不支持html()解析XML alert($( "b" ,xml).text()); $( "info" ,xml).each( function (){ alert($( this ).text()); }); } }); } </script> </head> <body> <div> <input type= "button" value= "点击进入ajax" onclick= "jj();" /> </div> </body> </html> |
Servlet代码:
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package servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class AjaxServlet extends HttpServlet { public AjaxServlet() { super (); } public void destroy() { super .destroy(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 这里响应类型必须是text/xml response.setContentType( "text/xml;charset=gbk" ); request.setCharacterEncoding( "gbk" ); PrintWriter out = response.getWriter(); // XML头,没有这个可能Javascript解析不出XML,最好设一下 StringBuilder sb = new StringBuilder( "<?xml version=\"1.0\" encoding=\"gbk\"?>" ); // 根元素<root></root>一定需要,否则Javascript解析不出XML,但名字不一定要叫root sb.append( "<root><info id='1'><b>a</b></info ><info id='1'>b</info><memo id='2'>c</memo><memo>d</memo></root>" ); //写出XML out.println(sb.toString()); out.flush(); out.close(); } public void init() throws ServletException {} } |